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Introduction

Netrin-4 is a secreted member of the laminin-related protein family, known to be involved in axonal guidance and endothelial cell survival, proliferation, and migration. We have recently reported the cellular localization of netrin-4 and its receptor neogenin in human first trimester and term placenta. A strong expression of netrin-4 was observed in trophoblast and in endothelial cells, suggesting a potential role of this protein in placental angiogenesis. In relation to human pregnancy, it has been reported that circulating netrin-4 were increased in fetal umbilical cord blood of intrauterine growth restriction IUGR compared to normal pregnancy suggesting an adverse effect of this protein on placental and fetal development. The aim of this study was to determine the role of netrin-4 in placental angiogenesis.

Methods

The effects of netrin-4 on proliferation, migration, tube-like organization, and spheroid sprouting of human placental microvascular endothelial cells (HPEC) were studied.

Results

We demonstrated that netrin-4 inhibits HPEC proliferation, tube-like formation, migration and spheroid sprouting, suggesting a direct role of netrin-4 in the regulation of intra-villus angiogenesis.

Discussion

This is the first report of an anti-angiogenic activity of netrin-4 in human placenta. This study brings new insights into netrin-4 roles in placental angiogenesis and suggests possible involvements of netrin-4 in angiogenesis-related pathologies such as IUGR."xsd:string
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http://purl.uniprot.org/citations/26390805http://purl.uniprot.org/core/author"Brouillet S."xsd:string
http://purl.uniprot.org/citations/26390805http://purl.uniprot.org/core/author"Vallee M."xsd:string
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http://purl.uniprot.org/citations/26390805http://purl.uniprot.org/core/author"de Mazancourt P."xsd:string
http://purl.uniprot.org/citations/26390805http://purl.uniprot.org/core/author"Feige J.J."xsd:string
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http://purl.uniprot.org/citations/26390805http://purl.uniprot.org/core/name"Placenta"xsd:string
http://purl.uniprot.org/citations/26390805http://purl.uniprot.org/core/pages"1260-1265"xsd:string
http://purl.uniprot.org/citations/26390805http://purl.uniprot.org/core/title"Inhibition of human placental endothelial cell proliferation and angiogenesis by netrin-4."xsd:string
http://purl.uniprot.org/citations/26390805http://purl.uniprot.org/core/volume"36"xsd:string
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